Time Difference: Singapore vs Sydney

Singapore (GMT+8) · Sydney (GMT+10)

Singapore

GMT+8

--:--:--

Sydney

GMT+10

--:--:--

Sydney and Singapore are in the same UTC offset

Time Difference

Singapore Offset

GMT+8

Asia/Singapore

Sydney Offset

GMT+10

Australia/Sydney

Summary

Singapore and Sydney share the same UTC offset

Business Hours Overlap (9 AM – 6 PM)

9 hours overlap during standard business hours in both cities.

Singapore	Sydney	Overlap
9 AM	9 AM	Business hours
10 AM	10 AM	Business hours
11 AM	11 AM	Business hours
12 PM	12 PM	Business hours
1 PM	1 PM	Business hours
2 PM	2 PM	Business hours
3 PM	3 PM	Business hours
4 PM	4 PM	Business hours
5 PM	5 PM	Business hours
6 PM	6 PM	Outside

Did You Know? — Singapore & Sydney

Time Zone Facts: Singapore

•Singapore Standard Time (SGT, UTC+8) is the same offset as Beijing, Hong Kong, Kuala Lumpur, and Perth — but Singapore's position just 1.3° north of the equator means the sun rises and sets nearly year-round at 7:00 AM and 7:00 PM.
•Singapore is often called the 'timezone crossroads of APAC': it sits halfway between India (UTC+5:30) and Japan (UTC+9), making it a practical midpoint for pan-Asian meeting schedules.
•As one of the world's few city-states near the equator, Singapore experiences virtually no seasonal variation in daylight — always approximately 12 hours — and never observes DST.

Time Zone Facts: Sydney

•Sydney uses AEST (UTC+10) in winter and AEDT (UTC+11) in summer — but because Australia's seasons are reversed, Sydney observes DST from October to April, the opposite of Northern Hemisphere cities.
•The Australian Securities Exchange (ASX) in Sydney opens at 10:00 AM AEST/AEDT and closes at 4:00 PM — it is the first major exchange to open each trading day globally.
•At 33.9°S in the Southern Hemisphere, Sydney has about 9.9 hours of daylight in June (its winter) and 14.4 hours in December (its summer).

Frequently Asked Questions

Singapore and Sydney are in the same time zone offset, so there is no time difference between them.

There are 9 overlapping business hours (9 AM–6 PM) between Singapore and Sydney. Scheduling during those hours ensures both parties are in their working day.

Singapore and Sydney share the same UTC offset (GMT+8), so their workdays are completely synchronized — no conversion needed, identical real-time availability, and deadline alignment is automatic.

Singapore observes GMT+8 (Asia/Singapore). A standard 9:00 AM–6:00 PM workday in Singapore maps to specific UTC hours — use UTC-anchored deadlines when coordinating with Singapore-based teammates to avoid confusion from local clock changes.

Sydney observes GMT+10 (Australia/Sydney). A standard 9:00 AM–6:00 PM workday in Sydney maps to specific UTC hours — use UTC-anchored deadlines when coordinating with Sydney-based teammates to avoid confusion from local clock changes.

If {cityA} and {cityB} follow different DST schedules — common in North America–Europe, Southern Hemisphere, or no-DST pairings — the time difference shifts by 1 hour during each transition. The 1–3 weeks between the two cities' clock-change dates create a 'gap window' that frequently catches teams off guard. The difference displayed here is always live and accounts for current DST status.

The best time to call Sydney from Singapore is during the 9-hour business-hours overlap window, when both cities are within their standard working day (9 AM–6 PM).

When it is midnight (00:00) in Singapore, it is 12 AM in Sydney.

No — Singapore and Sydney share the same UTC offset, so they are always on the same calendar date.

Singapore observes Asia/Singapore (GMT+8). For async-first teams, the most reliable approach is anchoring shared deadlines in UTC rather than any local time, and defining each member's 'availability window' — typically 9:00 AM–6:00 PM Asia/Singapore for Singapore. This eliminates confusion when DST transitions shift local clocks seasonally.

Sydney observes Australia/Sydney (GMT+10). For async-first teams, the most reliable approach is anchoring shared deadlines in UTC rather than any local time, and defining each member's 'availability window' — typically 9:00 AM–6:00 PM Australia/Sydney for Sydney. This eliminates confusion when DST transitions shift local clocks seasonally.

Yes — with 9 hours of overlapping business hours, Singapore and Sydney teams can hold real-time standups and synchronous collaboration daily during that window.